<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
	<script src="../jquery-3.3.1.min.js"></script>
    <script>
        $(function(){
            $("#btn").click(function(){
                // 动画链接
                // 此处 为函数内部 再次调用自身函数 所以起了函数名 直接f1
                $("div>img:last").hide(1000,function f1(){
                    $(this).prev().hide(1000,f1);
                });
            });
        });
    </script>
</head>
<body>
    <input type="button" id="btn" value="消失">
    <div>
        <img src="img/super_small_2b.png" alt="">
        <img src="img/super_small_2b.png" alt="">
        <img src="img/super_small_2b.png" alt="">
        <img src="img/super_small_2b.png" alt="">
    </div>
</body>
</html>